iPhone 7 Battery Health Reduced 5% after Replacement

​Hi bro , last month I changed my iPhone 7 battery,but with in one month my battery reduced upto 5% and again I visit to iplanet but they are not reposting me properly what should I do bro?

hello bro, do talk to apple customer care once. let them know about this problem too. use apple support app to chat with them or talk to them. they will run diagnosis and let you know if there is any problem in hardware or battery.